
The perfect blend of crunch and Mediterranean tastes come alive in this standout focaccia sandwich. Crispy panko chicken pairs with bold romesco sauce and flavorful garlic-parmesan butter. This isn't your run-of-the-mill sandwich - it's a thoughtfully built combo that turns basic ingredients into an unforgettable bite that works great for outdoor gatherings or fancy lunch options.
When I made these for my backyard get-together last week, everyone kept asking about the romesco sauce. Want to know what makes it so easy? I use store-bought roasted red peppers to save time without losing any of the amazing taste.
Key Ingredients and How to Pick Them
- Chicken Breasts: Go for similar-sized pieces so they cook evenly
- Focaccia: Good bread is what makes this sandwich special
- Panko Breadcrumbs: The Japanese style gives you the best crunch
- Roasted Red Peppers: The jarred kind work perfectly every time
- Sun-dried Tomatoes: They pack a punch of savory goodness in the romesco
- Fresh Herbs: The parsley brightens up the garlic butter wonderfully
Building Your Sandwich From Start to Finish
- 1. Getting Chicken Ready
- Cut breasts flat for thinner pieces, Set up flour-egg-crumb stations, Keep your oil at the right heat for crispy coating
- 2. Making Your Sauces
- Mix romesco parts until they're smooth, Combine herb butter until well mixed, Whip up your creamy dressing
- 3. Putting It All Together
- Brown focaccia with the garlic butter and cheese, Stack everything in the right order, Wrap it up nicely if you're taking it somewhere

Mastering Each Sandwich Part
Getting each element right will make your sandwich amazing. For the romesco, blend it mostly smooth but leave some tiny bits for interest. Let your garlic butter warm up naturally so it spreads easily and tastes better. When you're dealing with the greens, don't pour too much dressing on them or they'll get mushy fast.
Prep-Ahead Tips
Make your sandwich-making easier by doing some work early. You can mix up the romesco sauce and keep it for up to three days in the fridge. Do the chicken breading on the day you'll eat it so it stays super crispy. The garlic butter can be made ahead too, ready to add tons of flavor when needed.
Keeping Everything Fresh
To keep everything tasting its best, store all the parts in different containers. Put sauces in sealed containers in your fridge, and keep bread at room temp so it doesn't get hard. If you need to make sandwiches ahead, wrap them carefully so they stay intact and don't get soggy.
What to Serve With It
Round out your meal with sides that go great with these sandwiches. Try a simple green salad, Italian-style potato salad, tasty olives, or some fresh fruit to create a complete and balanced meal everyone will love.
Picking the Best Bread
Choosing the right focaccia can make or break your sandwich. Look for bread with lots of little dents on top, which shows it's got good air pockets inside. You want something sturdy but not too dense, so it can hold everything without falling apart. Try to avoid super oily kinds that might make your sandwich too heavy.
My family always adds a tiny bit of smoked paprika to the breadcrumb mix - it gives a deeper flavor that works so well with the romesco sauce.

I've tweaked this sandwich many times, and I've learned that success comes down to using good ingredients and putting them together in the right order. The warm, crunchy chicken against the cool greens, while the romesco mixes with the garlicky butter creates this amazing balance of hot and cold, soft and crispy. Whether you pack it for an outdoor lunch or eat it at your table, this sandwich shows how simple stuff can turn into something really special when combined thoughtfully.
Frequently Asked Questions
- → Can I make the sauce ahead of time?
- Of course! The sauce actually gets tastier after sitting in the fridge for a day or two. You can store it up to a week.
- → What works instead of focaccia?
- If you're out of focaccia, go for ciabatta or any sturdy rustic bread that can handle all the fillings.
- → Can prep be done early?
- You can get the romesco ready and the greens dressed ahead, but fry the chicken and toast the bread close to serving for the best bite.
- → What lettuce swaps are good?
- If you can’t find gem lettuce, try using romaine hearts or butter lettuce. A crunchy, sweet leaf works great.
- → How do I keep chicken crisp?
- Let the fried pieces rest briefly on paper towels to soak up extra oil. Don’t wrap the sandwiches until you’re ready to eat.